Data: 2023 USDA zones (PRISM/OSU) · NOAA 1991–2020 normals · updated

Planting zone for 46804 — Fort Wayne, IN

ZIP code 46804 (Fort Wayne, Allen County) is in USDA zone 6a: the coldest winter night averages −10 to −5 °F. The median last spring frost is April 24 and the first fall frost October 21.

Where ZIP 46804 is

Outlined: the ZIP code area · tap the map for the zone at any spot · scroll or pinch to zoom

Not the official USDA Plant Hardiness Zone Map. Zones come from the 2023 USDA hardiness-zone data by the PRISM Group, Oregon State University; we re-mapped and recolored them. The official map is at planthardiness.ars.usda.gov.

Zone6a−10 to −5 °F
Coldest night−23.3 to −20.6 °C
Last frostApr 24
First frostOct 21
2012 zone6a

Same zone as on the 2012 map. The zone is the one at the center of the ZIP code; hilly ZIPs can span two zones. What zone 6a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Fort Wayne, IN…

Forecast data: National Weather Service (api.weather.gov), public domain. This is not a warning service — for official frost and freeze warnings see weather.gov.

Frost dates in Fort Wayne, IN

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 24median — 50% chance of a later frost
Safe for tender plantsMay 10only 10% chance of frost after
First fall frostOctober 21median — 10% chance by Oct 8
Growing season178 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 12 and returns around November 1.

From the NOAA station Ft Wayne Intl Airport, IN — 6 miles away, elevation 791 ft. NOAA NCEI U.S. Climate Normals 1991–2020, 32 °F threshold. Low spots and valleys can freeze later in spring than the station.

When to plant vegetables in 46804

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 13 – Mar 27
SpinachSow outdoors · Mar 13 – Apr 3
Broccoli, cabbageStart indoors · Feb 13 – Feb 27
Broccoli, cabbageTransplant · Apr 3 – Apr 17
Onion setsPlant outdoors · Mar 27 – Apr 10
PotatoesPlant outdoors · Apr 3 – Apr 17
LettuceSow outdoors · Mar 27 – Apr 10
Carrots, beetsSow outdoors · Apr 3 – Apr 17
TomatoesStart indoors · Feb 27 – Mar 13
TomatoesTransplant · May 1 – May 15
Peppers, eggplantStart indoors · Feb 13 – Feb 27
Peppers, eggplantTransplant · May 8 – May 22
BeansSow outdoors · May 1 – May 15
Sweet cornSow outdoors · May 1 – May 15
Cucumbers, squashSow outdoors · May 1 – May 15
Fall lettuce, spinachSow outdoors · Aug 26 – Sep 9
GarlicPlant cloves · Oct 7 – Nov 11
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 24) and first fall frost (Oct 21) with the rules of thumb U.S. extension services publish. Cool-season crops take a light frost; warm-season crops do best once the soil is above about 60 °F.

When spring arrived in 2026

In 2026, spring leaf-out near 46804 came on Mar 12 — 22 days earlier than the 1991–2020 average (Apr 3).

JanFebMarAprMayJun

The Spring Index marks the day when accumulated warmth is enough for lilac and honeysuckle to leaf out — a widely used signal that the growing season has started. Source: USA National Phenology Network, www.usanpn.org — Spring Indices, first leaf, 2026 (data as of 2026-09-08) and 30-year average 1991–2020 (CC BY 4.0).

Native plants for zone 6a in Indiana

558 plants native to the lower 48 states, recorded in Indiana, and rated by the USDA to survive −10 °F or colder — the bottom of zone 6a. Each links to its USDA PLANTS profile.

Trees 71

American basswood100 ft · blooms late spring · low shade tolerance · to −46 °FAmerican beech80 ft · blooms mid spring · low shade tolerance · to −44 °FAmerican chestnut115 ft · blooms early summer · high shade tolerance · to −33 °FAmerican elm120 ft · blooms early spring · medium shade tolerance · to −46 °FAmerican sycamore100 ft · blooms spring · medium shade tolerance · to −34 °Farborvitae50 ft · blooms mid spring · medium shade tolerance · to −33 °F

Shrubs 105

alderleaf buckthorn3 ft · blooms late spring · low shade tolerance · to −33 °FAllegheny serviceberry35 ft · blooms early spring · low shade tolerance · to −38 °Falternateleaf dogwood25 ft · blooms mid spring · low shade tolerance · to −47 °FAmerican black currant3 ft · blooms early spring · to −46 °FAmerican hazelnut10 ft · blooms spring · medium shade tolerance · to −33 °FAmerican holly40 ft · blooms mid spring · low shade tolerance · to −20 °F

Wildflowers & perennials 200

American bur-reed3 ft · blooms indeterminate · medium shade tolerance · to −33 °FAmerican eelgrass1 ft · blooms mid summer · high shade tolerance · to −33 °FAmerican licorice4 ft · blooms late spring · medium shade tolerance · to −38 °FAmerican lotus3 ft · blooms mid summer · high shade tolerance · to −36 °FAmerican pokeweed7 ft · blooms mid summer · low shade tolerance · to −33 °FAmerican speedwell0.8 ft · blooms mid summer · low shade tolerance · to −38 °F

Grasses 161

American beachgrass2.5 ft · blooms spring · high shade tolerance · to −28 °Farctic brome3 ft · blooms early summer · low shade tolerance · to −33 °Fawlfruit sedge4 ft · blooms mid spring · low shade tolerance · to −38 °Fbeaked spikerush3 ft · blooms late spring · high shade tolerance · to −28 °FBebb's sedge3 ft · blooms late spring · low shade tolerance · to −38 °FBicknell's sedge3 ft · blooms late spring · low shade tolerance · to −38 °F

Vines 9

American bittersweet15 ft · blooms spring · low shade tolerance · to −38 °Fcatbird grape30 ft · blooms late spring · medium shade tolerance · to −13 °Fdevil's darning needles15 ft · blooms mid summer · medium shade tolerance · to −38 °Ffrost grape83 ft · blooms late spring · medium shade tolerance · to −23 °Friverbank grape45 ft · blooms late spring · medium shade tolerance · to −33 °Fsummer grape30 ft · blooms late spring · low shade tolerance · to −23 °F

Source: USDA, NRCS. 2026. The PLANTS Database (plants.usda.gov), National Plant Data Team — state distribution, native status and the “Temperature, Minimum” characteristic. Check light, moisture and soil needs before buying; local nurseries and your state native plant society can confirm what thrives in Fort Wayne, IN.

Soil in Fort Wayne, IN

The soil mapped at the center of ZIP 46804 is Glynwood — silt loam, moderately well drained.

TextureSilt loama good balance for most vegetables
pH6.4slightly acidic; most vegetables like 6.0–7.0
DrainageModerately well drainednatural drainage class
Organic matter1.75%low — add compost
Hydrologic groupDwater soaks in very slowly
Farmland classprime farmlandUSDA classification

Map unit: Glynwood silt loam, 2 to 6 percent slopes, eroded.

Soil Survey Staff, Natural Resources Conservation Service, USDA. Soil Survey Geographic (SSURGO) Database, via Soil Data Access, accessed 2026-10-29. The soil at the center point of ZIP 46804; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Fort Wayne, IN

Summer high84 °Faverage high, July
Winter low18 °Faverage low, January
Hot days16days a year at 90 °F or more
Freezing nights124nights a year at 32 °F or less
Growing degree days3,178base 50 °F — the season’s usable heat
Longest day15 h 08 mindaylight on June 21
Shortest day9 h 13 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation39.5 inper year, rain and melted snow
Snowfall34 inper year; 38 days with snow on the ground

Average high and low, by month

10°20°30°40°50°60°70°80°90°32 °FJanuary: average high 33 °F, low 18 °F 33°18° JanFebruary: average high 37 °F, low 21 °F 37°21° FebMarch: average high 48 °F, low 29 °F 48°29° MarApril: average high 61 °F, low 39 °F 61°39° AprMay: average high 72 °F, low 50 °F 72°50° MayJune: average high 81 °F, low 60 °F 81°60° JunJuly: average high 84 °F, low 64 °F 84°64° JulAugust: average high 82 °F, low 61 °F 82°61° AugSeptember: average high 76 °F, low 53 °F 76°53° SepOctober: average high 64 °F, low 43 °F 64°43° OctNovember: average high 49 °F, low 33 °F 49°33° NovDecember: average high 38 °F, low 24 °F 38°24° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″3″4″5″January: 2.54 in precipitation, 10.8 in snowfall 2.5❄11 JanFebruary: 2.06 in precipitation, 7.8 in snowfall 2.1❄8 FebMarch: 2.81 in precipitation, 4.6 in snowfall 2.8❄5 MarApril: 3.74 in precipitation, 0.8 in snowfall 3.7❄1 AprMay: 4.58 in precipitation 4.6 MayJune: 4.48 in precipitation 4.5 JunJuly: 4.05 in precipitation 4.0 JulAugust: 3.80 in precipitation 3.8 AugSeptember: 3.04 in precipitation 3.0 SepOctober: 2.95 in precipitation, 0.1 in snowfall 3.0 OctNovember: 2.96 in precipitation, 1.9 in snowfall 3.0❄2 NovDecember: 2.47 in precipitation, 7.6 in snowfall 2.5❄8 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Ft Wayne Intl Airport, IN (6 mi away); precipitation: Ft Wayne Intl Airport, IN (6 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 6a.

468146a
Fort Wayne, IN · 4 mi
468096a
Fort Wayne, IN · 4 mi
468026a
Fort Wayne, IN · 4 mi
468086a
Fort Wayne, IN · 4 mi
468076a
Fort Wayne, IN · 5 mi
468186a
Fort Wayne, IN · 6 mi
468056a
Fort Wayne, IN · 7 mi
468066a
Fort Wayne, IN · 8 mi

All 43 ZIP codes in Fort Wayne → · Indiana planting zones →

Questions about 46804

What planting zone is ZIP code 46804?

ZIP code 46804 (Fort Wayne, IN) is in USDA hardiness zone 6a on the 2023 map: the coldest night of an average winter reaches −10 to −5 °F (−23.3 to −20.6 °C).

When is the last frost in Fort Wayne, IN?

The median last spring frost (32 °F) near 46804 is April 24; after May 10 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Ft Wayne Intl Airport station.

When is the first frost in Fort Wayne, IN?

The median first fall frost near 46804 is October 21, giving a median frost-free growing season of 178 days.

When should I plant tomatoes in 46804?

Start tomato seeds indoors around Feb 27 – Mar 13 and set transplants outside around May 1 – May 15, one to three weeks after the median last frost.

How much rain and snow does 46804 get?

About 39.5 inches of precipitation a year and 34 inches of snowfall (NOAA 1991–2020 normals, Ft Wayne Intl Airport station).

How hot do summers get in Fort Wayne, IN?

The average high peaks at 84 °F in July, with about 16 days a year at 90 °F or more.

What kind of soil does 46804 have?

The USDA soil survey maps Glynwood at the center of ZIP 46804: silt loam, moderately well drained, pH about 6.4 (slightly acidic).

Did spring come early in Fort Wayne, IN in 2026?

Spring leaf-out near 46804 came on Mar 12 in 2026, 22 days earlier than the 1991–2020 average (Apr 3), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Fort Wayne, IN?

Long-day onions: the longest day near 46804 is 15 h 08 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).